Most strange isuue ever.

[PUMPISH]

Hi
I have made many MS projects but I never seen issuie like that-

Setup.

MS3x wasted spark straight six.

With ignition ON RPM jumps up and down without any cranking.

If I try this ECU on the other car the issue is gone and If i try this ECU on the other car it is no issue eather.
So the issue is NOT ECU.

We even tryed to disconect everything else on this car and only run ECU straight from the battery, the issue is stil here.

Here comes the logs.

[PUMPISH]

Found out if I remove USB cable from the computer then the ECU stops jumping

[MWPau]

Were you charging the laptop at the same time, or have it plugged into anything else?

[Ask92]

Have you tried a different laptop?